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S40977 Stainless Steel vs. EN 1.4521 Stainless Steel

Both S40977 stainless steel and EN 1.4521 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S40977 stainless steel and the bottom bar is EN 1.4521 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
23
Fatigue Strength, MPa 200
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 320
330
Tensile Strength: Ultimate (UTS), MPa 510
520
Tensile Strength: Yield (Proof), MPa 310
340

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
500
Maximum Temperature: Mechanical, °C 720
930
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
23
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.8
Embodied Energy, MJ/kg 27
39
Embodied Water, L/kg 97
130

Common Calculations

PREN (Pitting Resistance) 12
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
100
Resilience: Unit (Modulus of Resilience), kJ/m3 250
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 6.7
6.2
Thermal Shock Resistance, points 18
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 10.5 to 12.5
17 to 20
Iron (Fe), % 83.9 to 89.2
74.6 to 81.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.8